@keyframes warn {
0% {
transform: scale(0.3);
-webkit-transform: scale(0.3);
opacity: 0.0;
}
25% {
transform: scale(0.3);
-webkit-transform: scale(0.3);
opacity: 0.1;
}
50% {
transform: scale(0.5);
-webkit-transform: scale(0.5);
opacity: 0.3;
}
75% {
transform: scale(0.8);
-webkit-transform: scale(0.8);
opacity: 0.5;
}
100% {
transform: scale(1);
-webkit-transform: scale(1);
opacity: 0.0;
}
}
@keyframes warn1 {
0% {
transform: scale(0.3);
-webkit-transform: scale(0.3);
opacity: 0.0;
}
25% {
transform: scale(0.3);
-webkit-transform: scale(0.3);
opacity: 0.1;
}
50% {
transform: scale(0.3);
-webkit-transform: scale(0.3);
opacity: 0.3;
}
75% {
transform: scale(0.5);
-webkit-transform: scale(0.5);
opacity: 0.5;
}
100% {
transform: scale(0.8);
-webkit-transform: scale(0.8);
opacity: 0.0;
}
}
.container {
position: relative;
width: 120px;
height: 120px;
left: 10px;
top: 10px;
}
/* 保持大小不变的小圆点 */
.dot {
position: absolute;
width: 49px;
height: 49px;
left: 134px;
top: 134px;
-webkit-border-radius: 50%;
-moz-border-radius: 50%;
border: 1px solid #33ccff;
border-radius: 50%;
background-color:#33ccff; /* 实心圆 ，如果没有这个就是一个小圆圈 */
z-index: 2;
}
/* 产生动画（向外扩散变大）的圆圈 第一个圆 */
.pulse {
position: absolute;
width: 77px;
height: 77px;
left: 120px;
top: 120px;
border: 1px solid #3399ff;
-webkit-border-radius: 50%;
-moz-border-radius: 50%;
border-radius: 50%;
z-index: 1;
opacity: 0;
-webkit-animation: warn 2s ease-out;
-moz-animation: warn 2s ease-out;
animation: warn 2s ease-out;
-webkit-animation-iteration-count: infinite;
-moz-animation-iteration-count: infinite;
animation-iteration-count: infinite;
box-shadow: 1px 1px 30px #3399ff; /* 阴影效果 */
}
/* 产生动画（向外扩散变大）的圆圈 第二个圆 */
.pulse1 {
position: absolute;
width: 77px;
height: 77px;
left: 120px;
top: 120px;
border: 1px solid #3399ff;
-webkit-border-radius: 50%;
-moz-border-radius: 50%;
border-radius: 50%;
z-index: 1;
opacity: 0;
-webkit-animation: warn1 2s ease-out;
-moz-animation: warn1 2s ease-out;
animation: warn1 2s ease-out;
-webkit-animation-iteration-count: infinite;
-moz-animation-iteration-count: infinite;
animation-iteration-count: infinite;
box-shadow: 1px 1px 30px #3399ff; /* 阴影效果 */
}
</style>
</head>
<body>
由实心圆点向四周扩散（有阴影）
<div class="container">
<div class="dot"></div>
<div class="pulse"></div>
<div class="pulse1"></div>
</div>
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